diff --git a/lib/asn1/parse.y b/lib/asn1/parse.y
index 9b6cf7545..314db8884 100644
--- a/lib/asn1/parse.y
+++ b/lib/asn1/parse.y
@@ -48,7 +48,6 @@ RCSID("$Id$");
 
 static Type *new_type (Typetype t);
 void yyerror (char *);
-int yylex(void);
 
 static void append (Member *l, Member *r);